Universal kneading machine



FIG. 1 is a top, front, and right side perspective view of a universal kneading machine showing my new design;

FIG. 2 is a top, front, and left side perspective view thereof;

FIG. 3 is a top plan view; and

FIG. 4 is a rear elevational view thereof. 

The ornamental design for the universal kneading machine, as shown and described. 